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Old 07-15-2019, 06:49 PM
Brian yak dude is offline
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126" Slick Long Shot....

So recently I acquired one of my dream planes after flying Hlozek's Slick at Joe Nall.

I got the plane RTF with a DA-170 on pipes. It's (as expected) demonstrating a very tail heavy flight characteristic. I have 2 5000mah packs on the firewall and the PO strapped 5 large lead weights to the motor box as well. These weights have to at least be a few pounds together. On top of this it has a weighted prop washer. Needless to say, it's got a TON of weight in the nose. The rudder servos are pull-pull.

The plane obviously is quite heavy with all this weight, but it flies relatively well. My question is this:

If I got rid of the pipes, would anyone expect the CG to come significantly forward? I've experienced in the past that adding a pipe throws the CG back, but to be honest the pipes don't seem to extend THAT far behind the tube. I would really like to get as much of this unnecessary weight out the nose and lighten the plane up and am thinking of going to stock exhaust or trading out for a GP-178 with stocks as well.

Has anyone ever had experience with pipes in the old 3DHS Slick?
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Old 07-15-2019, 07:41 PM
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Brian - where do you fly in the Richmond area? I belong to several area clubs but mostly fly at Central VA RC in Amelia. If you havenít been out there, please come out and fly with us sometime.

Several years ago I assembled two 40% Yaks with DA150ís for NASA Langley and was surprised to see they both needed right at 4lbs. of steel plate bolted to the motor box to balance. This was with stock mufflers. These airframes were equipped with 2-8711ís on each elevator half so there was a little extra weight back there.

Don
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Old 07-15-2019, 08:37 PM
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Have you thought about going with a 4 cylinder with stock pipes?
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Old 07-15-2019, 08:41 PM
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Quote:
Originally Posted by rarcdon View Post
Brian - where do you fly in the Richmond area? I belong to several area clubs but mostly fly at Central VA RC in Amelia. If you havenít been out there, please come out and fly with us sometime.

Several years ago I assembled two 40% Yaks with DA150ís for NASA Langley and was surprised to see they both needed right at 4lbs. of steel plate bolted to the motor box to balance. This was with stock mufflers. These airframes were equipped with 2-8711ís on each elevator half so there was a little extra weight back there.

Don
Iíve only flown in Fredericksburg so far as Iím brand new to the area. Iíd love to come check out a new field. Right now though I have a small amount of damage in the tail of this bird that needs fixing and Iím just not sure if I want to try and tackle it. Iím really bummed to hear about needing 4lbs.

Quote:
Originally Posted by highonthai View Post
Have you thought about going with a 4 cylinder with stock pipes?
I have considered it, but hadnít made a decision yet. Iím a big fan of GP so I was leaning towards that route, but Iíve thought about going for a 222. Iím having a harder time selling this 170 and pipes for what I figure itís worth though.
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